Having been surrounded by Top Secret codewords for decades, I felt that much of the information I was aware of was soon dated, and, frankly, much of it was bullroar. What was of concern to the intelligence community was not the information itself (plausible deniability plays a role in its construction) but how the information was secured. Ever since Jimmy Carter ripped the CIA a new one with Stansfield Turner at the helm, Signals intelligence has generally replaced humint, or human intelligence gathered on the ground. And I personally would much prefer to see humint coversheets in the Trump co0llection.
Personally, I understand why such reports would be of interest to Trump. I would think that he, like other Presidents before him, is preparing an autobiography covering his time in office. And I wish him well.
Parenthetically, if on leaving government it was discovered that I had taken some of the delicious cables I can recall, I would go to jail. Thus, I envy the President because he is in the position of declassifying documents, and he can do so for his own purposes — which previous Presidents found no need to explain. Is the FBI on a witch hunt? Damned tootin. However, that patient is so diseased it is quite possible we will never learn the depth of its collective degradation.
I was TSCW in the AF until 1970 when separated. USAFSS in Vietnam and Kadena AFB.